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Critics say research on fetal tissue is no longer needed to answer crucial medical questions. But National Institutes of Health officials and other scientists say alternatives don't yet measure up.

After meeting the homeless child in Brazil, Queen Silvia was inspired to speak out about the abuse and exploitation of children and to establish the World Childhood Foundation.

Traditionally, the three daily meals in America are breakfast, lunch and dinner. But did our forebears eat four times a day instead of three?

The former NSA contractor's first tweet was, "Can you hear me now?" Snowden is still in Russia, after leaking a large cache of highly classified material.

One reason is that it would take the Curiosity rover about a year to get there, even with no obstacles and no traffic. But the other reason might surprise you.

A new Vanderbilt University study found that Tennessee's Voluntary Pre-K for low-income children has no lasting benefits, stirring up an age-old debate in education circles.

World leaders agree on at least one thing when it comes to the war in Syria: ISIS is now a global threat that needs to be countered. President Obama chaired a special U.N. summit on the issue, and he says an international coalition is growing — though some countries differ on how to handle Syrian President Bashar Assad.

The U.S. launched an airstrike in Afghanistan on Tuesday, one day after Taliban forces overtook the city of Kunduz — the first time the Taliban has captured a provincial capital since 2001.

The former NSA contractor was up to more than 600,000 followers hours after joining Twitter. His presence on the social-media platform could mean domestic surveillance makes a campaign comeback.

Noah Gundersen uses his devout religious upbringing to examine faith and spirituality in his music. Meredith Ochs reviews his latest album, Carry the Ghost.